Philco Prototype Rectangular CRT

This tube uses a 10BP4 gun, requiring an ion trap. The base of the neck
looks like the 12DP7 WW2 radar tube. The face is about 14 inches
diagonally. The glass is distorted and appears to have been hand worked.
The tube came from a Philco engineer, and may have been a prototype of a
rectangular tube made by Philco, or it may have been the individual work
of the engineer.

The tube was generously donated to the Early Television Foundation by
Darryl Hock.